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Phrase(s): sit on the fence (about something)
Go to on the fence (about something)., Phrase(s): sit on the fence
Fig. not to take sides in a dispute; not to make a clear choice between two possibilities. (Fig. on the image of someone straddling a fence, representing indecision.) • When Jane and Tom argue, it is best to sit on the fence and not make either of them angry. • No one knows which of the candidates Joan will vote for. She’s sitting on the fence.
McGrawhill's American Idioms And Phrasal Verbs